SessionLocaleResolver,LocaleUtils

whatsmars-spring-boot/src/main/java/com/itlong/whatsmars/spring/boot/controller/UserController.java

 package com.itlong.whatsmars.spring.boot.controller;
 
 import com.itlong.whatsmars.spring.boot.config.UserConfig;
+import com.itlong.whatsmars.spring.boot.util.LocaleUtils;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.context.MessageSource;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.i18n.LocaleContextHolder;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.servlet.LocaleResolver;
-import org.springframework.web.servlet.i18n.FixedLocaleResolver;
+import org.springframework.web.servlet.i18n.AbstractLocaleResolver;
+import org.springframework.web.servlet.i18n.SessionLocaleResolver;
 
+import javax.servlet.http.HttpServletRequest;
 import java.util.Locale;
 import java.util.Map;
 
@@ -24,25 +25,33 @@ public class UserController {
     private UserConfig userConfig;
 
     @Autowired
-    private MessageSource messageSource;
+    private LocaleUtils localeUtils;
 
     /**
      * 设置区域解析器 (default is AcceptHeaderLocaleResolver)
      */
     @Bean
     public LocaleResolver localeResolver() {
-        FixedLocaleResolver localeResolver = new FixedLocaleResolver ();
-        localeResolver.setDefaultLocale(Locale.US);
+        AbstractLocaleResolver localeResolver = new SessionLocaleResolver();
+        localeResolver.setDefaultLocale(Locale.CHINA);
         return localeResolver;
+    }
 
+    @RequestMapping("/changeLang")
+    @ResponseBody
+    public String changeLang(HttpServletRequest request, String lang){
+        if ("zh".equals(lang)) {
+            request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, new Locale("zh", "CN"));
+        } else if("en".equals(lang)){
+            request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, new Locale("en", "US"));
+        }
+        return "lang:" + lang;
     }
 
     @RequestMapping("/")
     public String home(Map<String,Object> map) {
         map.put("hello", "Hi, boy!");
-        Locale locale = LocaleContextHolder.getLocale();
-        String country = messageSource.getMessage("country", null, locale);
-        map.put("country", country);
+        map.put("country", localeUtils.getMessage("country"));
         return "index";
     }
 

whatsmars-spring-boot/src/main/java/com/itlong/whatsmars/spring/boot/util/LocaleUtils.java

+package com.itlong.whatsmars.spring.boot.util;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.MessageSource;
+import org.springframework.context.i18n.LocaleContextHolder;
+import org.springframework.stereotype.Component;
+
+import java.util.Locale;
+
+/**
+ * Created by shenhongxi on 2017/6/28.
+ */
+@Component
+public class LocaleUtils {
+
+    @Autowired
+    private MessageSource messageSource;
+
+    public String getMessage(String key) {
+        Locale locale = LocaleContextHolder.getLocale();
+        return messageSource.getMessage(key, null, locale);
+    }
+}